[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: ASRSG question

Original poster: "david baehr" <dfb25@xxxxxxxxxxx>

..years ago, on my 8"dia. coil , I used an 'asrsg' and had to set my electrodes to almost touching also,...this was with NO static gaps in seiries, it just would'nt work with them. The trans was 14400 and the rotary had 8 electrodes, ballasted with a welder. I tried differnt heat settings and adding resistance to the circuit and RPMs too, with no improvement. Yes, R.Hull had seiries gaps with his rotary on Nemisis , and , to this day, still cant figure out why my system would not work, I was using the big TCBOR .02 rolled caps..........But with the rotary set close, that coil would really sing ! Its on one of the TCBOR video tapes, 'TEMPEST' was the coil...

>From: "Tesla list" <tesla@xxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: ASRSG question
>Date: Sat, 02 Apr 2005 11:14:38 -0700
>Original poster: FutureT@xxxxxxx
>You mentioned setting the electrodes as close as possible.
>How close was that? In some cases for small coils I've had to run
>electrodes almost touching (just a few thousands of an inch).
>I'm not recommending that for your case however because
>if tungsten runs too close, the electrodes tend to break off
>if they strike each other.
>Nevertheless folks such as Richard Hull often used a series
>multiple static gap in series with their rotary and still didn't
>have a problem despite the wider total gap spacing. Are you
>using a static gap in series with your rotary? If such is used
>and has too-wide gaps it will cause a problem.
>In a 120 bps system, the firing voltage may be somewhat
>higher so it may make it easier for the gaps to fire. Still,
>many folks use 2 or 4 gaps or more with ASRG systems,
>and don't have the problem you had.
>Maybe the problem is that you are only using
>two electrodes on your rotor. This requires a very high
>motor speed to get a high break-rate. These speeds
>may make it difficult for the rotary to fire if the electrodes
>are narrow in diameter. Lower speeds may
>give erratic firing as the system semi-phases in with the
>input ac power 60Hz waveform. ASRG users often use
>8 or 10 electrodes on their rotors, and run at a lower RPM.
>I remember Bob Svangren once mentioning that he tried
>using 6 spinning electrodes instead of the normal 8, and
>his system failed to work at all. Perhaps it gave him a too-low
>Wider electrodes (such as 1/2" dia) will tend to fire more
>reliably because there's more time available for firing during
>the mechanical dwell time. Usually 14.4kV doesn't give a
>problem. Folks who use 7.2kV may need to set their
>gaps somewhat close.
>The particular capacitor value that's used along with the
>ballasting inductance value also affects the firing voltage
>and can be a factor in gap firing.
>So anyway I've presented some ideas for consideration above.
>I'm not sure though exactly what's happening in your system.
>Regarding the 180 degree electrode positions, such a gap
>may run cooler, and make it harder for the electrodes to fire
>John Freau